It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 518 510 918 is not a prime number.
For example, 518 510 918 can be divided by 2: 518 510 918 / 2 = 259 255 459.
For 518 510 918 to be a prime number, it would have been required that 518 510 918 has only two divisors, i.e., itself and 1.
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518 510 918 is an even number, because it is evenly divisible by 2: 518 510 918 / 2 = 259 255 459.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 518 510 918 is about 22 770.835.
Thus, the square root of 518 510 918 is not an integer, and therefore 518 510 918 is not a square number.
The square of a number (here 518 510 918) is the result of the product of this number (518 510 918) by itself (i.e., 518 510 918 × 518 510 918); the square of 518 510 918 is sometimes called "raising 518 510 918 to the power 2", or "518 510 918 squared".
The square of 518 510 918 is 268 853 572 085 202 720 because 518 510 918 × 518 510 918 = 518 510 9182 = 268 853 572 085 202 720.
As a consequence, 518 510 918 is the square root of 268 853 572 085 202 720.
518 510 918 is a number with 9 digits.
The multiples of 518 510 918 are all integers evenly divisible by 518 510 918, that is all numbers such that the remainder of the division by 518 510 918 is zero. There are infinitely many multiples of 518 510 918. The smallest multiples of 518 510 918 are: